<template>
<div class="box">
  <div class="top"></div>
  <div class="center"></div>
  <div class="bottom"></div>
</div>
</template>

<style>
body,html{
  width: 100vh;
  height: 100%;
}
.box{
  width: 100rem;
  background: red;
  height: 177.866667rem;
}
</style>
